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Thread: Freaking Out

  1. #1

    Default Freaking Out

    Thing has been running great and out of the blue it's freaking out. Won't start unless you push the gas pedal. The TPS changes value even when you aren't moving the throttle at all. The IAC valve will randomly open even while your driving.
    Is there a master reset? I've disconnected the battery. Gone back through the setup. Got it up to temp and got my TPS to 0 and the IAC to 6. Come back the next day and it's all out of wack again. Not sure how to proceed from here?

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,685

    Default

    Quote Originally Posted by Brad Ashcraft View Post
    The TPS changes value even when you aren't moving the throttle at all.
    The TPS sensor is located at the end of the primary throttle shaft, opposite end of the throttle lever. It's slotted, so install it in the same position. Holley 543-111 TPS or Standard Motor Products TH191 TPS.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

    Default

    I just bought this thing in January. TPS bad already?

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,685

    Default

    I don't know. If it's the problem, follow post #2.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5

    Default

    I'm not one to throw parts at a vehicle until it works. There has got to be a testing process to verify what the problem is.

  6. #6
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    836

    Default

    You could measure signal output on the TPS sensor to see if it has a clean sweep as the throttle opens.

  7. #7

    Default

    Sent a datalog in and they're sending me a new TPS. Thanks for the input.

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